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Finding the Fourth Proportional to 422.80, 583.92 and 377

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Solution

The fourth proportional to 422.80, 583.92 and 377 is: 520.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.80 : 583.92 = 377 : x
  2. Step 2: Convert to fraction form
    422.80/583.92 = 377/x
  3. Step 3: Cross multiply
    422.80x = 583.92 × 377
  4. Step 4: Simplify right side
    422.80x = 220,137.84
  5. Step 5: Solve for x
    x = 220,137.84/422.80
  6. Step 6: Final answer
    x = 520.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.